Valve would've fixed maps crashing the game within a day if they knew what was going on. Apparently they have no idea what's going on. Which is the case for many things in TF2.

I mean, give me a logical explanation on how adding 4 maps, 16 cosmetics, 4 reskins, some unusual effects, and a taunt can cause a game to be so bloody unstable as TF2 is right now. It's almost impossible to play on any of the Invasion maps because for some reason they like to crash TF2. It's even worse on OS X and Linux.

Yup, everybody with a computer that's not equipped with high-end hardware (read: 90% of home computers) that have texture resolution set at normal or low will have to accept the terrible framerate with high texture quality because otherwise the game will crash. Now, us OS X and Linux people would be fine if it weren't for the fact that Valve LIMITED the texture quality to normal because the game would run out of addressable memory if it weren't, thanks to the awesome memory management on those platforms which they still haven't fixed.